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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09c9ea0008ddf0a1c4e1ee6bd6963285ad3bee3d18b90d1ae97b1c665ec53189' 
  AND token = 'Ap9NciDzNNHYbS6wG4IFfpGemXjwgA1LP3wA0Aglkh8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}